Diodes Incorporated DDTA143FCA-7-F

Overview

DDTA143FCA-7-F from Diodes Incorporated is a 50V PNP pre-biased transistor in SOT23 package, featuring integrated R1 = 4.7kΩ and R2 = 22kΩ bias resistors. It delivers DC current gain (h_FE) of 68 at I_C = −10mA, V_CE = −5V, with V_OUT(ON) ≤ −0.3V and I_OUT = −100mA max. Used for digital logic interface level shifting and low-side load switching in automotive body control modules.

For engineers reviewing the DDTA143FCA-7-F datasheet, DDTA143FCA-7-F pinout, DDTA143FCA-7-F application, or DDTA143FCA-7-F equivalent, key selection criteria include input voltage threshold (−1.3V @ I_OUT = −3mA), output saturation voltage, resistor ratio tolerance (±20%), and AEC-Q101 qualification status for automotive use.

Technical Context

This device integrates a PNP bipolar junction transistor with two monolithically embedded resistors (R1 to base, R2 from base to emitter) to eliminate external bias components. Its fixed R1/R2 ratio enables predictable turn-on behavior without external tuning.

Designed for direct interfacing with 3.3V/5V CMOS/TTL logic, it operates with Vin(on) = −1.3V (at I_OUT = −3mA), supports −100mA continuous output current, and maintains thermal stability up to +150°C junction temperature in SOT23 package.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic package with 3 terminals, 0.008g weight, JEDEC-compliant outline (2.9mm × 1.3mm × 1.0mm), moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP pre-biased transistor applications.

Compared with DDTA143ZCA-7-F, DDTA143FCA-7-F offers faster turn-off due to lower R2, improving PWM fidelity; versus DDTC143FCA-7-F, it provides complementary PNP functionality essential for sink-driven loads like automotive sensors and LED anodes.

Availability

DDTA143FCA-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and smart home appliance control requiring stable component supply and long-term manufacturing continuity.

Supply support for DDTA143FCA-7-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

This part belongs to the DDTA (R1≠R2 Series) CA pre-biased transistor family, engineered specifically for simplified digital interface design in automotive, industrial, and consumer applications where space, reliability, and qualification compliance are critical.

FAQ

What is the marking code for DDTA143FCA-7-F on the SOT23 package?

The top-side marking for DDTA143FCA-7-F is "P10", followed by a two-character date code (e.g., "MD" for December 2025). This matches the ordering information table in DS30334 Rev. 8–2, confirming traceability to Diodes' standard SOT23 laser-marking convention.

Is DDTA143FCA-7-F qualified for automotive applications?

Yes - DDTA143FCA-7-F is AEC-Q101 qualified, manufactured in IATF 16949 certified facilities, and supports PPAP documentation. Its −55°C to +150°C operating range, green RoHS 3 compliance, and halogen-free construction meet automotive electronics requirements per Diodes' product definitions page.

Can DDTA143FCA-7-F replace a discrete PNP transistor plus two resistors?

Yes - it replaces a BC807-40 or MMBT3906 plus 4.7kΩ and 22kΩ external resistors. The integrated R1/R2 network provides identical biasing behavior with tighter tolerance (±20% R2/R1 ratio), reduced layout area, and improved thermal coupling between resistors and transistor die.

What is the recommended PCB pad layout for SOT23 mounting?

Per Diodes' package outline DS30334 Rev. 8–2, use a 2.0mm × 0.8mm copper pad for the center lead (Emitter), 1.35mm × 0.9mm pads for Collector and Base, with 2.9mm overall length. Thermal relief vias under the emitter pad improve heat dissipation, especially critical for 200mW power handling.